Sound repeater for sound reproducing machines



June 9, 1931. D. w. RANTINE 1,808,789

SOUND REPEATER FOR SOUND REPRODUCING MACHINES Filed Aug. 24, 1928 2 Sheets-Sheet l 1 INVENToR azz el Wmalzizlla BY www. 4%

o ATTQLRlLv/EY June 9; 1931. D w RAN-HNE 1,808,789

SOUND REPEATER FR SOUND REPRODUCING MACHINES Filed Aug.- 24, 1928 2 sheets-sheer 2 INVENToR X3i/.a ATTORNEY Patented June 9, 1931 DANIEL WILLIAM RANTINE, OF vBROOKLYN, N EW lYORK soUND BEPEATER Fon SOUND nErRonUcrNG MACHINES application mea August 24, 192s. serial Naso-1,815. Y,

This invention relatesl to phonogra'ph're-` peaters and more particularly to ydevices whereby an ordinary disc record may be re-g peatedly played without manual resetting.

One of the objects of the invention'is to provide a mechanism having a pair of reproducers to operate alternately on the record face, their spacing `being adjustable to requires no special skill or experience in its --1 successful operation.

rlhese advantageous objects areV accomplished by the novel constructiom'combination and arrangement of partslas hereinafter described and illustratedin the accompanying drawings, forming a material part of this disclosure, Vand in Which: Figure 1 is aside elevational view ofan embodiment of the invention, parts being in section as taken on line 1-1 of Fig. 2. I

Figure 2 is a top plan view of the same illustrating its application.

Figure 3 is a horizontal sectional .view taken in a plane indicated by the line 3-3 of Fig. 4.

Figure 4 is viewtakenon line 4-`-4 of Figs. 2 and 3.

Figure 5 is a partial transverse sectional view taken on line 5-5 of Fig. ,2.-

Figure 6 is a sectional view Ataken yon line 6 6 of Fig. s. Y Y

` A fragmentary portion of a conventionalv gramaphone cabinet, generally Vdesignated by the numeral 10, is shown in Figs. 1 and 2 as provided with a fixedcover 11 through the center of which extends an upright spindle 12 driven by motor means as usual. 1

The spindle 12 has secured on itsupper portion a circular table 14 on which Vthe record discs 15 are centered by the end of the spindle and frictionally driven bythe table,

a partial longitudinal sectional.

Vall these elements being well known and in i Secured to the cover 11 is a base plate 16 through which the spindle 12 passes, anof- Y setfextending portion of the plate providing a bearin for a vertical spindle 17 havin an enlarge upper end or head 17 its shou der resting on the plate and its lower end being journalled yin the base 18of a cylindriczil casing 18 fixed on the lower side of the plate 16, the spindle being rotatably held but prevented from longitudinal movement by a collar 19 fixed on its extending end as seen in Figs. 1 and 5.

Mounted in a head `17 of thespindle is an axle bar 20 its ends being-rotatably engaged in diametrically opposed openings in a base formed on the lower and mounted on the recess in its upper edge,

third ring 22 in a corresponding manner is a ring 24 and seated on it is a fourth Vand up.-

Y and head of a clamp bolt 28 reaching through the cover 26, `ing provided its extending threaded `end *bewith 'a thumb nut 29 .by which the rings 22, 24 and 25 may be rigidly clamped together. Y

It is to be noted that the rings 22424,1-25 and cover 26 `may rotate as a unitlwith' the base ring 21,V which is entirely supported and Vcarried by the axle bar to freely oscillate or tip sidewise therein, andthat `the bar 2O transverse opening in the ring 21 having a p concentric annular groove 21 in its upper. surface in which is engaged a corresponding` :ly shaped annular ridge edge of a second similarrmg 22, having a like is carried by the spindle 17 which is free to L Arotate in either y direction,

thus providing' a .Y

limited range of tilting and rotary movement for the unit.

' Resting on the base platel is a cylindrical shield Vhaving an inreachin'g upper "edge making loose contact with the basering 21, covering the space between it and the base plate and permitting the ring to move freely in any direction. l

` the record being used a curved scale plate 47 is attached toy one of the tone arms andto thevv Theuppermost ring 25 has lateral openings 31 kand the next adjacent lower ring 24 has similar openings 32 in their opposite sides, these openings admitting soundl from Y impinge on diaphragms carried by the repro!v y j edge, opposite the bracket 46, is

f 50 connected by 1 55 hollow tone arms 33-34 rigidly connected to the rings 24-25 respectively on their outer "surfaces Yto cover the openings therethrough.

The free ends. of the tone arms are out t-urned and have attached to them reprocluc-V ers 35-36 carrying styli 37438 adapted vto traversethe face of therecord disc 15 from edge to center, from opposite sides, the styli being set at proper angles and arranged to ducer heads as usual.

' From the foregoing it willbe seen thatfras one or the other of the styli are moved bythe I sound grooves of a rotatingrecord, the Sound willbe transmitted through the reproducer to which it is attached and thence through the'tone arm to the space within-thieringsV and4V eventually outifroin the casing y184 to any preferred type of amplifyinghorn fattachedto it, the plate 16 and casing ,base 18 being respectively apertured. as at -16 -and 18ffor the sound to pass freely therethrough.

Fixed to pivotV in the larms axis 28, are studs 39-40 drilled and threaded to receive an Vadjusting screw 41-provided with right and left hand threads and' having a'knurled head 42 by which it maybe turned readily. Y I y At the center ofthe screw, betweenits oppositely threaded portions, are collars 43having between them a fork 44'fastened to the ring 22and 'further held, stationary by arscrew 45 the point ofwhich contacts with an angular bracket 46 vfixed on the lower ring 21 above'the shield 30, this brackethaving a part 'engaging arecessinqthe extending, Y,end of thev axlebar 20, retaining it in posi,-V tion, see Fig. 4. Y

In lorder to gage the' distancebetweenA the reproducers in accordancevwith theisizeof other arm is -secured asimilar arcuate plate 48 provided with an index pointer 49 bywhich the scaleV on the plate 47 may be Yread as-th'efV screw 41 is turned in Iadjusting the arms.4

Fixed onthe base ring 21;, near itsY upper ahingefleaf agpintle to an upper leaf 51,' abent'iat spring 52 is `interposedbetween the leaf 51 and an angle bracket ixedon the ring 22,'r the ends V of the Yspring being connected to the bracket and leaf by screws '54, the arrangement being such 'a'svtop'ermit the reproducers, tone arms and kelements connected by the bolt '.28 toV swing upwardly on the hinge.. f

Also'jrigidly secured on the base vring 21,

'Y above the guard 3() and at a 'right angle with the center line of the brackets 4G-+53, is Van 33%34, near the plane, see Fig. 6, enclosing an open space therebetween.

slide 62 movableradially with respect to the axisl7 and' having at its vraised inner end a the oscillator arm 5 rounded knob 63 adjustablyengageable With provided with, a scale 65 which indicates the arc lengtlroffthe, stylus movement and is trail-'ersable by apointer lever 66 pivoted lon a pin 67 set in a projection 62 of the slide `and extending through av slot 68 in the `vrOnthe laterallyextending portion of the base plateV 16 isA secured akpair of spaced 1guides60--61 between whichis guided a The guide 61 has a raised arcuate edge 64 pointer body, whichis actuated by a knob 69 set therein.

. vThe opposite endof the rlever 66 has pass- Y ing through it a bolt 70 having a clamp ynut a slot-72in the slide 62 permittingmove` ment of the slide relative to the boltwh'ich passes therethrough and acts as the pivot for the lever 66.

71'to hold the lever in an adjustedposition, -Y

'Vion vIn operation, the styli arevsetto'the rightl Sdistanceapart for the size ofthe record by v yslacking' the clamp bolt nut 29, adjusting the screw 41 until-.the pointer and scale indicate the correct distance and then re-clamping the Velements firmly together. *In order to conveniently and correctly set the arms to a record the distance between the styliof the two reproducers should be known andalso the length of thesweep vor movement of the 'styli over the face ofl the record. Y TheSediStanCes 'may preferably be determined from a printed label tral portion of the record. f

- The styliv are raised and lowered relative to theV record groove bythe adjusting screw 45, causing the upperfrings to move on the hinge 50*51, the spring52takingfup any slight inequalities. Vhen thesweep or stroke of thestyli is known the'timer slide 62 is adjusted by the index lever 66- to the scale 65 andv then covering vthe cen-,

clamped by the bolt 7 O, the 'knob 62co-acting with the oscillator arm55 which moves over it, tilting the united rings,"arms and repro-V f fk ducers and'causing the stylus 37 to contact the disc 15, simultaneouslyraising,thestylus 88 therefrom.

1 As the stylus 37 moves ovcrthe record disc towardsits center, the ar'm'55 passes over fdisc, the oscillating arm moving in a circular path around the knob 63', which may be adjusted to tilt the ring unit at any point along the face of the disc as may be desired.

The foregoing disclosure is to be regarded as descriptive and illustrative only, and not as restrictive or limitative of the invention, of which obviously an embodiment may be constructed including many modiiications without departing from the general scope herein indicated and denoted in the appended claims.

Having thus described the invention, what is claimed as new andV desired 'to secure by Letters Patent, is

1. In a repeater for graphophones using disc records, a plurality or" superposed rings having interengaging edges, a cover thereover, bolt to clamp said rings and cover said rings and cover constituting a sound chamber, and a pair of reproducer 'carrying arms carried respectively by the two upper rings said arms being hollow and open to said chamber.

2. In a repeater for graphopliones using disc records, a plurality of superposed rings having interengaging edges, a pair of tone arms fixed in open communication with two adjacent rings and carrying reproducers at tlie-ir outer ends, means for adjusting the angular distance between said arms, indicator having a scale to show such distance, and means `tor clamping the arm carrying rings when adjusted.

8. In a repeater for graphophones using disc records, a plurality of superposed'rings having interengagiiig edges, a base ring therebelow, a horizontal 4spindle passing diametrically through the base ring, a rotatably mounted vert-ical shaft having a head in which said spindle is mounted, re-pro'ducer carrying arms attached to two adjacent upper rings, and a single means toclamp all of said rings eXcept the base ring when said arms are in adjustment.

4. In a repeater for graphophones using disc records, a plurality of superposed rings having interengaging edO'es, aV hinge con necting the base ring and next adjacent ring, means for clamping all otsaid rings except the base ring, a spring interposed over said hinge and adjacent ring, and means for adjusting said clamped rings relative to the base ring.

5. In a repeater for graphophones using disc records, a plurality of superposed rings having interengaging edges, a base ring therebelow, an oscillator arm fixed on said base ringa base plate, means on said platel to oscillatably and rotatably support `,said base ring-and" other means on said base plate adjustabily contactabl-e with said arm to control theoscillations of said rings relative lto their rotarymovement.' f Y 6. In a repeater for graphophones using disc records, a base plate attached to the graphophone, an upright shaft `journalled therein, a horizontal spindle journalled in the upperjend of said sliaft,a base ring pivot-V ally carried by said spindle, aV series of rings interengaged at their edges witheach-other and with said base ring, reproducer arms carried by two adjacent rings, of the series means for clamping all the rings lof said series, and a guard ring mounted on said base f plate circumjacent said base ring.

7. A repeater for sound. reproducting machines using a flat record disc, comprising a base plate iixed to entend from the machine,

a laterally rockable and axially rotatable baise ring mounted on said plates, a series of rings interengaged at theiry edges, a cover thereover, means for clamping saidseries of rings as a unit, hinge connections between said base ring and unit, a pair of opposed reproducer carrying arms attached to two adjacent relatively rotatable rings Lof said series, said reproducers having styli to engage the grooves of a record, means for adjusting the ydistance apart of said reproducers, means for raising and lowering the styli upon said hinge, and means for rocking said rings and associated parts in timed alternate relation.

8. A repeater for sound reproducing machines using a flatrecord disc, comprising a base plate iixed to extend from the machine, a 'laterally roclable and axially rotatable Mb ase ring mounted on said plates, a series of rings interengaged at theiredges, a cover thereover, means for clamping said rings as a` unit, tone arms Vcomniunicfa'tively `attached to. two rings in said series, said arms having opposed reproducers at their ends provided with styli to engagel the record from opposite sides of its face, means toadjust the angular distance apart of said arms relative to the aXis of said unit, and a scale by which the distances apart of the arms may be deterf mined.. j Y A 9. A repeater for sound reproducing machines using a flat record disc, comprising a base plate fixed to extend from the machine,

a llaterally rockable and axially rotatable base ring mounted on said plates, a seriesof rings interengaged at their edges, a cover thereover, means for clamping said rings as a unit, tone arms communicatively attached to two rings in said series, said arms having opposed reproducers at their ends lprovided with styli to engage the. record from opposite sides oits face, and means totilt all of said iso Y,

, lcylinder limitedly sidewise, an oscillating f armfixed onV the base-ring of said cylinder, a

f'v wise movementof said' timer is iy said lever.

rings andia'ssociated parts alternately inop-` posite lateral directions whereby the styli are alternately brought into operative relation with the record.

l0. A repeater for sound reproducing machines using a flat record disc, comprising a base plate fixed to extend from the machine, a laterally rockable and aXiall-y rotatable base ring mounted onqsaid plate, a series of rings intereneaeed at their edfres a cover there- Y over, means for clamping said rings as aunit,

tone arms communicatively attached to two Vupper rings in said series7 said arms having opposed reproducers at their ends pro-vided with styli to engage the record from opposite sides of its face, means to automatically tilt said ,arms and associate parts to bring said styli alternately into contact with the record, and meansA to adjustably vary the periodicity of such alernations.

V1l. A repeater for sound reproducing machines usinga flat record disc, comprising` a base plate xed, to eXtendfroin the machine, a hollow cylinder mounted to rotate axially thereon, said cylinders being,` composed of va plurality of sections, means to'tilt said cylinderlimitedly sidewise, a tone arm carried by the uppermostsectioln, a second tone arm Carried on the opposite side of the next adj acent-section, said arms being provided with f styli carrying` reproducers adapted to alternately engage the record, means to adjust the Contact between the styliY and record, said Vmeans permitting the arms to be raised upright, means for adjustably spacing y said arms, and means to control the time between *tilting the cylinder and attached parts from one position to another. K

12. repeater for sound reproducing ma- Vohines using a flat record disc, comprising a base-plate Xed to extendffrom the machine, a sectional hollow cylinder mounted to rotate and tilt on its aXisthereon, means'to tilt said slidable timer-platecarried on the extending base-plate to coact with the "oscillating Varm of the cylinder, a pointed lever fixed to move said timer'platend'a scale on which the end- Y dicated by y In testimony whereof I have signed my name to'thisy application.

RANTINE. j 

